Subject: Re: [PATCH v2 bpf] libbpf: fix missing __WORDSIZE definition

From: Arnaldo Carvalho de Melo <[email-masked]>
Date: Fri, 26 Jul 2019 17:49:37 -0300

Em Thu, Jul 18, 2019 at 10:30:21AM -0700, Andrii Nakryiko escreveu:
> hashmap.h depends on __WORDSIZE being defined. It is defined by
> glibc/musl in different headers. It's an explicit goal for musl to be
> "non-detectable" at compilation time, so instead include glibc header if
> glibc is explicitly detected and fall back to musl header otherwise.
> 
> Fixes: e3b924224028 ("libbpf: add resizable non-thread safe internal hashmap")
> Reported-by: Arnaldo Carvalho de Melo <[email-masked]>
> Signed-off-by: Andrii Nakryiko <[email-masked]>

Couldn't find ths in the bpf tree, please consider applying it:

Tested-by: Arnaldo Carvalho de Melo <[email-masked]>

- Arnaldo

> ---
>  tools/lib/bpf/hashmap.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/tools/lib/bpf/hashmap.h b/tools/lib/bpf/hashmap.h
> index 03748a742146..bae8879cdf58 100644
> --- a/tools/lib/bpf/hashmap.h
> +++ b/tools/lib/bpf/hashmap.h
> @@ -10,6 +10,11 @@
>  
>  #include <stdbool.h>
>  #include <stddef.h>
> +#ifdef __GLIBC__
> +#include <bits/wordsize.h>
> +#else
> +#include <bits/reg.h>
> +#endif
>  #include "libbpf_internal.h"
>  
>  static inline size_t hash_bits(size_t h, int bits)
> -- 
> 2.17.1

-- 

- Arnaldo